package com.atguigu.yygh.user.api;

import com.alibaba.fastjson.JSONObject;
import com.atguigu.yygh.common.helper.JwtHelper;
import com.atguigu.yygh.common.result.Result;
import com.atguigu.yygh.model.user.UserInfo;
import com.atguigu.yygh.user.service.UserInfoService;
import com.atguigu.yygh.user.utils.ConstantWxPropertiesUtils;
import com.atguigu.yygh.user.utils.HttpClientUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Map;

/**
 * @author 林俊伟
 * @create 2021-11-21 14:38
 */

//restcontroller 会返回json数据  controller不会 会跳转
    //微信操作接口
@Controller
@RequestMapping("/api/ucenter/wx")
public class WeixinApiController {

    @Autowired
    private UserInfoService userInfoService;

    //2回调方法，得到扫码人信息
    @GetMapping("callback")
    public String callback(String code,String status)  {
        //第一步 获取临时票据 code
        System.out.println("code"+code);
        //第二部 拿着code和微信id和秘钥 请求微信固定地址
        //使用code和appid以及appscrect换取access_token
        //  %s   占位符
        StringBuffer baseAccessTokenUrl = new StringBuffer()
                .append("https://api.weixin.qq.com/sns/oauth2/access_token")
                .append("?appid=%s")
                .append("&secret=%s")
                .append("&code=%s")
                .append("&grant_type=authorization_code");

        String accessTokenUrl = String.format(baseAccessTokenUrl.toString(),
                ConstantWxPropertiesUtils.WX_OPEN_APP_ID,
                ConstantWxPropertiesUtils.WX_OPEN_APP_SECRET,
                code);
        //使用httpclient请求这个地址
        try{
            String accesstokenInfo = HttpClientUtils.get(accessTokenUrl);
            System.out.println("accesstokenInfo:"+accesstokenInfo);
            //从返回字符串获取两个值 openid 和 access_token
            JSONObject jsonObject = JSONObject.parseObject(accesstokenInfo);
            String access_token = jsonObject.getString("access_token");
            String openid = jsonObject.getString("openid");

            //判断数据库是否存在微信的扫描人信息
            //根据openid判断
            UserInfo userInfo = userInfoService.selectWxInfoOpenId(openid);
            if(userInfo == null){  //数据库不存在微信信息
                //第三步 拿着openid 和 access_token 请求微信地址
                //最终得到扫码人信息
                System.out.println("这里有输出");
                String baseUserInfoUrl = "https://api.weixin.qq.com/sns/userinfo"+
                        "?access_token=%s"+
                        "&openid=%s";
                String userInfoUrl = String.format(baseUserInfoUrl,access_token,openid);
                String resultInfo = HttpClientUtils.get(userInfoUrl);
                System.out.println("resultInfo:"+resultInfo);
                JSONObject resultUserInfoJson = JSONObject.parseObject(resultInfo);

                //用户昵称
                String nickname = resultUserInfoJson.getString("nickname");
                //用户头像
                String headimgurl = resultUserInfoJson.getString("headimgurl");

                //获取扫码人信息添加到数据库
                userInfo = new UserInfo();
                userInfo.setNickName(nickname);
                userInfo.setOpenid(openid);
                userInfo.setStatus(1);
                userInfoService.save(userInfo);
            }


            //返回name和token字符串
            Map<String, String> map = new HashMap<>();
            String name = userInfo.getName();
            if (StringUtils.isEmpty(name)) {
                name = userInfo.getNickName();
            }
            if (StringUtils.isEmpty(name)) {
                name = userInfo.getPhone();
            }
            map.put("name", name);

            //判断userInfo是否有手机号，如果手机号为空，返回openid
            //如果手机号不为空，返回openid值是空字符串
            //前端判断：如果openid不为空，绑定手机号，如果openid为空，不需要绑定手机号
            if (StringUtils.isEmpty(userInfo.getPhone())) {
                map.put("openid", "");
            } else {
                map.put("openid", "");
            }
            //使用jwt生成token字符串
            String token = JwtHelper.createToken(userInfo.getId(), name);
            map.put("token", token);
            //跳转到前端页面
            return "redirect:" + ConstantWxPropertiesUtils.YYGH_BASE_URL +
                    "/weixin/callback?token=" +
                    map.get("token") + "&openid=" +
                    map.get("openid") +
                    "&name=" + URLEncoder.encode(map.get("name"), "utf-8");


        }catch (Exception e){
            e.printStackTrace();
            return null;
        }

    }

    //1生成微信二维码
    //返回生成二维码所需要参数
    @GetMapping("getLoginParam")
    @ResponseBody
    public Result genQrConnect(){
        try{
        Map<String,Object> map = new HashMap<>();
        map.put("appid", ConstantWxPropertiesUtils.WX_OPEN_APP_ID);
        map.put("scope","snsapi_login");
        String wxOpenRedirectUrl = ConstantWxPropertiesUtils.WX_OPEN_REDIRECT_URL;
        wxOpenRedirectUrl = URLEncoder.encode(wxOpenRedirectUrl,"utf-8");

        map.put("redirect_uri",wxOpenRedirectUrl);
        map.put("state",System.currentTimeMillis()+"");
        return Result.ok(map);
        }catch (UnsupportedEncodingException e){
            e.printStackTrace();
            return null;
        }
    }



}
